The development and validation of a chemical kinetic model for anisole, a compound to represent biomass pyrolysis fuels

Forskningsoutput: KonferensbidragKonferenspaper, ej i proceeding/ej förlagsutgivet

Abstract

Lignocellulosic biomass is a promising alternative fuel source which can promote energy security, reduce greenhouse gas emissions, and minimize fuel consumption when paired with advanced combustion strategies. Pyrolysis is used to convert lignocellulosic biomass into a complex mixture of phenolic-rich species that can be used in a transportation fuel. Anisole (or methoxybenzene) can be used as a surrogate to represent these phenolic-rich species. Anisole also has attractive properties as a fuel component for use in advanced spark-ignition engines because of its high blending research octane number of 120. Presented in the current work are new measurements of laminar burning velocities, jet-stirred reactor (JSR) speciation of anisole/O2/N2 mixtures, and the development and validation of a detailed chemical kinetic mechanism for anisole. Homogeneous, steady state, fixed temperature, perfectly stirred reactor CHEMKIN simulations were used to validate the mechanism against the current JSR measurements and published JSR experiments from CNRS-Nancy. Pyrolysis and oxidation simulations were based on the experimental reactant compositions and thermodynamic state conditions including P = 1 bar and T = 675-1275 K. The oxidation compositions studied in this work span fuel lean (φ = 0.5), stoichiometric, and fuel rich (φ = 2.0) equivalence ratios. Premixed laminar burning velocities were measured on a heat flux stabilized burner at an unburnt T = 358 K, P = 1 bar and simulated using the CHEMKIN premixed laminar flame-speed module. Under pyrolysis and oxidative conditions, unimolecular decomposition of anisole to phenoxy radicals and methyl radicals was found to be important due to the relatively low bond strength between the oxygen and methyl group, ~65 kcal-mole-1

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Lawrence Livermore National Laboratory
  • Institute for Engineering and Systems Sciences
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik

Nyckelord

Originalspråkengelska
StatusPublished - 2017 jan 1
PublikationskategoriForskning
Peer review utfördJa
Evenemang10th U.S. National Combustion Meeting - College Park, USA
Varaktighet: 2017 apr 232017 apr 26

Konferens

Konferens10th U.S. National Combustion Meeting
LandUSA
OrtCollege Park
Period2017/04/232017/04/26